pH: A measure expressing the concentration of hydrogen ions (H+) in a solution, indicating its acidity or alkalinity. It reflects how many free hydrogen ions are present, which directly influences biochemical processes.
Homeostasis of pH: The body's maintenance of internal pH within narrow limits essential for life. This regulation ensures that the hydrogen ion concentration remains stable despite metabolic activities that produce acids.
Acidosis: A condition where blood pH falls below normal limits, indicating excess acidity. It results from an increase in hydrogen ions or a decrease in buffering capacity, potentially disrupting vital functions.
Alkalosis: A condition where blood pH rises above normal limits, indicating excess alkalinity. It involves a decrease in hydrogen ion concentration, which can impair enzyme activity and other physiological processes.
1. What is a key feature of pH regulation in biological systems?
2. What is the main reason maintaining blood pH within the narrow range of 7.35 to 7.45 is critical for human health?
3. Who is credited with discovering or proposing the concept of the proton as the nucleus of hydrogen?
pH regulation — importance?
Maintains enzyme activity and biochemical stability.
pH — definition?
Measure of hydrogen ion concentration.
Hydrogen ion — role?
Determines acidity and influences pH.
Homeostasis of pH — importance?
Maintains stable blood acidity for proper function.
Acidosis — pH level?
Blood pH below 7.35.
Alkalosis — pH level?
Blood pH above 7.45.
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